IGA-PD Penalty-Based Coupling for Immersed Air-Blast Fluid-Structure Interaction: A Simple and Effective Solution for Fracture and Fragmentation

TL;DR

This paper introduces a simple penalty-based immersed coupling method combining Isogeometric Analysis and Peridynamics to effectively simulate air-blast fluid-structure interactions, fracture, and fragmentation.

Contribution

It presents a novel weakly volume-coupled FSI formulation using a penalty approach, enhancing robustness and simplicity in simulating complex fracture phenomena.

Findings

Demonstrates robustness in simulating ductile and brittle solids

Shows effectiveness in modeling fracture and fragmentation

Validates approach with numerical examples

Abstract

We present a novel formulation for the immersed coupling of Isogeometric Analysis (IGA) and Peridynamics (PD) for the simulation of fluid-structure interaction (FSI). We focus on air-blast FSI and address the computational challenges of immersed FSI methods in the simulation of fracture and fragmentation by developing a weakly volume-coupled FSI formulation by means of a simple penalty approach. We show the mathematical formulation and present several numerical examples of inelastic ductile and brittle solids that clearly demonstrate the power and robustness of the proposed methodology.